The original from The Best of Townes Van Zandt is tuned down a half-step!
[Intro:]
Finger pick A to Bm
[Verse 1]
D
Living on the road my friend
A
Was gonna keep you free and clean
G
Now you wear your skin like iron
DA
Your breath's as hard as kerosene
G
You weren't your mama's only boy
DG
But her favorite one it seems
BmGA
She began to cry when you said goodbye
GBm
And sank into your dreams
[Verse 2]
Pancho was a bandit boys
His horse was fast as polished steel
Wore his gun outside his pants
For all the honest world to feel
Pancho met his match you know
On the deserts down in Mexico
Nobody heard his dying words
That's the way it goes
[Chorus]
G
All the federales say
DG
They could have had him any day
BmGA
They only let him hang around
GBm
Out of kindness I suppose
[Verse 3]
Lefty he can't sing the blues
All night long like he used to
The dust that Pancho bit down south
Ended up in Lefty's mouth
The day they laid poor Pancho low
Lefty split for Ohio
Where he got the bread to go
There ain't nobody knows
[Chorus]
G
All the federales say
DG
They could have had him any day
BmGA
They only let him hang around
GBm
Out of kindness I suppose
[Verse 4]
The poets tell how Pancho fell
Lefty's livin' in a cheap hotel
The desert's quiet and Cleveland's cold
So the story ends we're told
Pancho needs your prayers it's true,
But save a few for Lefty too
He just did what he had to do
Now he's growing old
[Chorus]
G
All the federales say
DG
They could have had him any day
BmGA
They only let him hang around
GBm
Out of kindness I suppose
G
All the federales say
DG
They could have had him any day
BmGA
They only let him hang around
GBm
Out of kindness I suppose

Great tab ! But , if you don't want to tune down, do what he did in Heartworn highways . Put a capo on the 1st , and instead of G play C , A -> G7 , G -> F. Bm -> Am , but for " She began to cry when you said goodbye " line , it actually goes from C to Dm . When playing the openin C he hits the third fret on the e string a few times and then do a pull- off ,then during the G7 he do a little walk ; it goes open B string , 3rd fret B string , 1st fret e string , and then he do a pull of and walk the same way the other way around . Also from passing from a verse to another , he do a walk up from Am to C , wich is Open A string , 2nd fret A string , 3rd fret A string . I didnt figure out all the variations during the F chord.. But i guess this can be usefull :)